Isabelle Mary "Belle" White (1 September 1894 – 24 June 1972) was a British diver, who competed in the 1912 Summer Olympics, 1920 Summer Olympics, 1924 Summer Olympics and 1928 Summer Olympics.
She was born in London and died in Muswell Hill.
In the 1912 Olympics she won a bronze medal in the 10 metre platform event. Eight years later in Antwerp she was fourth in the 10 metre platform event. Four years later in Paris she was sixth in the 10 metre platform event. Four years later in Amsterdam she was fourth in her first round heat in the 10 metre platform event and did not advance.